fix(mottarone): add nm dispatcher script for vpn

systems/mottarone/default.nix

@@ -9,6 +9,8 @@
     ./urbackup.nix
   ];
 
+  boot.blacklistedKernelModules = [ "kvm_intel" ];
+
   environment.systemPackages = with pkgs; [
     gtkterm
     remmina
@@ -38,7 +40,20 @@
     '';
   };
 
-  networking.firewall.allowedTCPPorts = [ 8000 ];
+  networking = {
+    firewall.allowedTCPPorts = [ 8000 ];
+    networkmanager.dispatcherScripts = [
+      {
+        type = "basic";
+        source = pkgs.writeShellScript "vpnUpHook" ''
+          if [ "$2" == "vpn-up" ]; then
+            resolvectl default-route tun0 true
+            logger "Set default-route to tun0"
+          fi
+        '';
+      }
+    ];
+  };
 
   services = {
     resolved = {
@@ -76,11 +91,5 @@
   ];
 
   programs.virt-manager.enable = lib.mkForce false;
-  virtualisation = {
-    libvirtd.enable = lib.mkForce false;
-    virtualbox.host = {
-      enableKvm = true;
-      addNetworkInterface = false;
-    };
-  };
+  virtualisation.libvirtd.enable = lib.mkForce false;
 }